Polymer electrolyte membrane fuel cells based on Nafion and acid-doped PBI: State-of-the-art and recent progress

Ｐｏｌｙｍｅｒｅｌｅｃｔｒｏｌｙｔｅｍｅｍｂｒａｎｅｆｕｅｌｃｅｌｌｓ (ＰＥＭＦＣ)ａｒｅｒｅｃｅｉｖ ｉｎｇｍｏｒｅａｎｄｍｏｒｅａｔｔｅｎｔｉｏｎｄｕｅｔｏｔｈｅｉｒａｂｉｌｉｔｉｅｓａｓａｐｏｗｅｒｇｅｎｅｒ ａｔｏｒｆｏｒｂｏｔｈｓｔａｔｉｏｎａｒｙａｎｄｔｒａｎｓｐｏｒｔａｔｉｏｎａｐｐｌｉｃａｔｉｏｎｓ[1] .Ｔｈｅｆｅａ ｔｕｒｅｓｏｆｔｈｅＰＥＭＦＣａｒｅｈｉｇｈｐｏｗｅｒｄｅｎｓｉｔｙ ,ｌｏｗｏｐｅｒａｔｉｏｎａｌｔｅｍ ｐｅｒａｔｕｒｅ ,ｐｏｌｌｕｔｉｏｎｆｒｅｅｏｐｅｒａｔｉｏｎ ,…     

《信息系统数据备份与管理暂行规定》正式发布

随着电力体制改革的深入和进程的加快、随着公司信息系统中保存的关键数据愈来愈多,为了避免人为的和不可抗拒的自然灾害及计算机软硬件故障造成的数据破坏,确保生产、经营、管理等业务的安全稳定运行,必须加强对信息系统数据的保存和管理。为规范信息系统数据备份方式和管理制度,国家电力公司编制了《信息系统数据备份与管理暂行規定》(见本期光     

混合信号集成电路衬底噪声的一种连续时间直接测试方法

建立了混合信号集成电路中衬底噪声对模拟电路影响的一种通用模型，在此基础上，提出了衬底噪声测试的一种新的连续时间直接测试方法。该方法采用差分放大器作为衬底噪声探测器，能测试频率高达1GHz的衬底噪声。     

MHT多媒体编辑演播系统—经济实用的商业多媒体系统软件解决方案

如果您正工作于一家从事系统集成的公司并经常接触多媒体系统,或者您拥有这样一家公司;如果您正在寻找一款功能紧凑的多媒体系统集成商用软件,或者客户希望您提供一款易于操作的多媒体维护平台;如果您急于想解决软件使用的版权问题而又一筹莫展,或者因为高额的软件费用不得不在商业行为中冒着使用盗版软件的     

Total Coloring of G×P_n and G×C_n

1 IntroductionGraph treated in this paper are finite, undirected, loopless and without multiple edges. For a graph G, we use V(G) (resp.E(G)) to denote its set of vertices (resp.edges).The n colors are labled by 0,1,(, n-1, respectively.A total coloring of a graph G is a map , f, from the set E(G)∪V(G) to the set of colors C such that no two incident nor adjacent element of E(G)∪V(G) are painted by the same color. If |C | = k, then G is said to be k-colorable.The total chromatic numb…     

A new method for lengthening SR pulses periodicity in HLS

1IntroductionSynclirotronradiation(SR)isapowerfultoolfOrresearchinphysics,chedristryandbio1ogy.SReAnttedfromdipolemagnetisaseriesofpulseswithastrict"timestructure."ItsperiodisdeterndnedbythefrequencyofRFcavityandtheililingmodeofelectronbu-nches,sowecanadjusttheperiodofSRpulsebychangingthenUInberofelectronbunchesinstoragering.SincethestorageringofHLSisouly66mlong,thecycllcalperiodofelectron,Tc,is22ons,thatis,evenifinsinglebunchoperationmodethemakimumperiodoftheSRpulseis22Ons.However,som…     

Study on syntheses and characterizations of polymethylphenethylsilane, polymethylcyclohexylsilane and their copolymers

Ｄｕｒｉｎｇｔｈｅｌａｓｔ10ｙｅａｒｓ,ｃｏｎｓｉｄｅｒａｂｌｅｗｏｒｋ[1,2]ｈａｓｂｅｅｎｐｅｒｆｏｒｍｅｄａｎｄｒｅｖｉｅｗｅｄｏｎｐｏｌｙｓｉｌａｎｅｓｙｎｔｈｅｓｉｓ.Ｔｈｅｓｅｐｏｌｙｍｅｒｓａｐｐｅａｒｖｅｒｙｉｎｔｅｒｅｓｔｉｎｇａｓｒｅｓｉｓｔｓｆｏｒｍｉｃｒｏｌｉｔｈｏｇｒａｐｈｙ,ｔｈｅｐｒｅｃｕｒｓｏｒｓｆｏｒｃｅｒａｍｉｃｓｏｒｅｖｅｎａｓｃｏｎｄｕｃｔｉｎｇｍａｔｅｒｉａｌｓ.ＴｈｅｙａｒｅｇｅｎｅｒａｌｌｙｓｙｎｔｈｅｓｉｚｅｄｂｙＷｕｒｔｚｔｙｐｅｃｏｕｐｌｉｎｇｏｆｓ…     

On the fault-tolerant routing in distributed loop networks

Based on their "Theorem 2", an O(δ)-time algorithm of searching for the shortest path between each pair of nodes in a double loop network was proposed by K.Mukhopadyaya, et al.(1995). While, unfortunately, it will be proved that both "Theorem 2" and its proof are in error. A new and more faster O(△)-time, △≤δ, algorithm will be presented in this paper.     

NEWEVIDENCESFORTHEFORMATIONOFGRAN

ＮＥＷＥＶＩＤＥＮＣＥＳＦＯＲＴＨＥＦＯＲＭＡＴＩＯＮＯＦＧＲＡＮＩＴＩＣＲＯＣＫＳＢＹＲＥＭＥＬＴＩＮＧＯＦＴＨＥＳＩＡＬＣＲＵＳＴＩＮＳＯＵＴＨＥＲＮＨＵＮＡＮＰｅｎｇＳｈｅｎｇｌｉｎＹａｎｇＤｅｊｉａｎｇＬａｉＪｉａｎｑｉｎｇＳｈａｏＹｏｎｇ...     

METALLOGENIC CONDITIONS OF GOLD-BEARING SKARN DEPOSITS ALONG THE MIDDLE-LOW ER REACHES OF THE YANGTZE RIVER

ＭＥＴＡＬＬＯＧＥＮＩＣＣＯＮＤＩＴＩＯＮＳＯＦＧＯＬＤ－ＢＥＡＲＩＮＧＳＫＡＲＮＤＥＰＯＳＩＴＳＡＬＯＮＧＴＨＥＭＩＤＤＬＥ－ＬＯＷＥＲＲＥＡＣＨＥＳＯＦＴＨＥＹＡＮＧＴＺＥＲＩＶＥＲＺｈａｎｇＳｈｕｇｅｎＷａｎｇＤａｗｅｉ（Ｄｅｐａｒｔｍｅｎｔｏ...